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Fig. 8. Selected images of skin stratus treated with P25TiO2NPs 10% (left) and VitaminB2@P25TiO2NPs 10% (right) under light, showing no penetration of the nanoparticles (white arrows) beyond the outer stratum corneum.
Food additive or carcinogen? The growing list of chemicals banned in EU but used in US, by Mikaela Conley, The Guardian, June 23, 2022